Straight-pin pinning attachment for presses



Feb. 10., 1931. J. w. MANsr-IELD STRAIGHT PIN PINNING ATTACHMENT FOR PRESSES Filed May 20, 1950 2 Sheets-Sheet l vak.

Feb. I', 193i.

J. w. MANSFIELD STRAIGHT PIN PINNING ATTACHMENT. FOR PRESSES Filed May 20, 1930 2 Sheets-Sheet 2 "a: al if Patented Feb. 10, 1931 UNITED STATES' PATENT. o-IfFlfcr-zV JOHN W.V MANSFIELD", OF DETROIT, MICHIGAN STRAIGHT-PIN PINNING ATTACHMEN'rl ron rnnssns,

Application. led May 520, 1930. SerialNo. 454,165.

charge only a single pinat a time through theVV under face of a presser block and which is so associated with the presser block that the latter may be lowered for operation upon a body for the purpose of pressing a discharged pin thereinto without effecting the pin discharge mechanism. l

The invention will be best understood from y a consideration of the following detailed def'- scription taken in connection with the accom panying drawings forming-part ofthis specilication, with the understanding, however, I that the invention is not confined to any strict V conformity with the showingof the drawings but may be changed or modified so long as such changes 0r 4modications mark no ma- Y terial` departure from the salient features of the invention as expressed in the appended claims.

Int-he drawings: Figure 1 is a view in side elevation of an arbor press showing the application of the present invention thereto. 3-5* Figure 2 is an enlarged detailed view partly in elevation and partlyin section of the attachment illustrating the operation thereof.

Figure 3 is an enlarged sectional view of the lower portion of the attachment showing the method ofreleasing a pin.

Figure 4c is a: horizontal: sectional View" through the casing of the pin holding bar and i the associated elements.

Figure 5 is a view ofa base block in which 'a pin receivingbore hasI been formed at an angle other than a ninety degree angle to the work. y

In the drawings the'straight pin pinnerembodying the present invention is shown as Vapmf plied to an arbor press' which is indicated gen- Another object of the invention is tofpro" erally by the numeral 1. This press has the arbor portion 2l through which there worksfina verticall planea rack 3 operatedby a pinion 4L tothe shaft of whichvthe armsA 5 arev attached. 1

On.Y the base 6 of the press is mounted al base block 7 which is disposed directly beneath the rack 3 and attached to the lower fend: of-this rack is a presser block 8 which `may b e` moved down into contact with thecoi base block for effecting apressing operation.V

In the present invention the presser block 8 is providedrin its rear face with theinwardly 4 and downwardly directed bore 9y which, -ad- Jacent Vits lower .end7 communicateswith a 65".

'straight downwardly directed bore or p assage 10 which opens through the bottom ofA the' presser block Vand which has opening thereinto from the rear face of the presser blockI the inwardly directed passage11,"thel 70 outer end of which is of enlarged diameter, and threaded as indicated at 12.

Y The'base block 7 is provided witha pin receiving recess 13 with which thepin disi charging passage Y10 of the presser 4bloclr75 comes into alignment when the presser block f Y is lowered.

Threaded-into the outer portion of thel rearwardly` directed passage 11 in 'the presser block and extending vrearwardlyl from the i presser block at right angles to the face there- I of is a cylinder 111, the outer end"of which f is-closedby a cap 15 which maintains in place l within the cylinder a coill spring 16. VExtending longitudinallythrough the spring 16 and 85 through the cylinder Vlet is a pin 'retaining' bar 17 the inner end of which normally eX- tends-.into the passage 10lunder the influence of the spring 16, the inner end of which bears against a transverseistop 18 carried bytheQO Y* pin'- holding barlf'. Y The outer end ofthe bar-,17. passesthrough the'cap 15 and is pivotally secured inthe bifurcated leg 19 carrying the base'bl'oclc contacting foot 20. A.

This foot 20 has its under surface rounded.95 as indicated at 21so that when the presser block 8 is brought downlonto the working: surface of the baseV block 7 the rounded.' portion ofthe foot 20 whichproj ectsaslight dis.-Vv tance below the bottom face of the presser 10 block 8 will be brought into contact with the base block and will slide thereon so that the leg 19 will be caused to shift into an angular position from the vertical fulcruming at its upper end against the cap 15 and thus pulling out the bar 17 against the tension of the spring 16.

Extending down into the passage 9 is a pin delivering tube 22, the upper end of which carries and has discharging thereinto a hopper or funnel 23 in which a number of pins are placed when the machine to which the device is applied is in operation.

The presser block 8 is preferably pivotally connected to the operating rack or bar 3 to which it is attached so that a slight amount of fieXibility is permitted to compensate for any unevenness which may exist between the opposing. faces of the presser block and base block and the faces of a body interposed therebetween and into which a pin is to be pressed.

In the operation of the present machine the operating handle or arm 5 is manipulated so that the bar 3 and the mechanism carried thereby will be raised, during which operation a stop member, such for example as the pin 24, will be brought into contact with the upper part of the arbor to jar the hopper 23 and thus cause a number of the pins 25 to be fed into the tube 22.

The presser block will then be lowered until it is brought into contact with the base block 7 at which time the foot 29 will be oscillated as previously described retracting the bar 17 and allowing one of the pins 25 to pass down through the discharge passage 10 and into the recess 13 in the base block. The presser block is then again raised and the piece of work into which the pin is to be pressed, such for example as the washer 26 in which a suitable pin receiving aperture 27 has been formed, is then placed into position on the base block 7 with the aperture 27 in position to receive the pin 25 standing upright in the recess in the base block, after which the` presser block is again lowered until it comes into contact with the washer which it forces down onto the base block carried pin forcing this pin into the aperture 27. It will, of course, be understood that due to the interpo sitioning of the washer 26 between the base block and the presser block the foot 20 will be prevented from coming into Contact with the base block and therefore no pin will be discharged during this operation.

After one of the pins 25 has been discharged into the base block receiving recess 13 in the manner above described, as soon as the presser lblock 8 is lifted from contact with the base until the pressing operation described' has` been completed and the presser block again lowered onto the base block.

lVhile have particularly described the application of a pin to a washer or other body, in a position at right angles to the surface of the body, it is, of course, to bc understood that I do not wish to be limited in this manner for this device may also be employed for inserting pins into bodies at angles other than at right angles. For example, in Figure 5 there is illustrated a base block .indicated by the numeral 7 upon which is shown a washer 26. This washer has an aperture 27 formed therethrough at an obiique angle with respect to the surface of the washer as shown. In order to insert the pin into an aperture disposed at an angle like this it is necessary that the block 7 have the aperture 13 which is formed therein arranged at the same angle with respect to the top surface thereof as the angle 27 is arranged with respect to the surface of the washer 26. rlhis is the only change necess ry in the construction of the device to enable one to insert pins at any angle desired. In other words, the base block must have the pin receiving aperture or bore disposed at the same angle as the passage in the body into which the pin is to be pressed.

`While l have particularly described the present invention as being applicable to an arbor press it is, of course, to be understood that l do not wish to be limited in any manner in this respect for it will be readily obvious to those familiar' with the art to which this invention relates that the device may be readily used in association with other types of machines such for example as drill presses, punch presses or the like.

Having thus described my invention, what l claim is: Y

l. ln a machine of the character described having a base block and a vertically reciprocable element thereover and movable rela.-

tive thereto, a presser block carried by the' reciprocable element and -having a downwardly opening passage therethrough, means for supplying pins to said passage for dis'- charge therethrough into aircceiving recess in the base block, and a pin retaining member adapted to be tripped upon b 1inging the presser block into contact with the base block for the release of a pin for discharge into the base block recess.

2. vIn a machine having a base bloei; and a reciprocabi-,e presser element movable relative thereto, said presser element having a passa ge therethrough opening' downwardly towards the base block and the base block having a recess in alignment with said passage, a pin feeding member arranged to discharge pins into said passage, a laterally movable pin re tainer carried by the` presser block and ex tensible into the pin receiving passage to normally prevent the passage of a pin 'therethrough, and a spring controlled oscillatable member carried-by the pin retainer, said oscillable member contacting with the base block upon the lowering of the presser block thereagainstto retract the pin retainer for the discharge'of a pin into said recess.

3. The combinationwith a press having a base block and a reoiprocable member mov-Y able relative thereto, a presser block carried by said member and having a passage therethrough opening through the lower face thereof in alignment with an upwardly opening recess in the base block, a pin hopper, a conveyor leading pins from said hopper into said presser block passage, a laterally shiftable bar carried by the presser block and having one end eXtensible into said passage to control the movement of pins therethrough, resilient means normally urging said bar inwardly, and a trip element oscillatably-oarried by the bar and adapted when brought into contact with the base block to retract the bar against'the action of the resilient element to permit the passage of a pinto the base block recess.

4L. The combination with a press having a base block and a reciprocable member movable relative thereto, a presser block carried by said member and having a passage therethrough opening through the lower Vface thereof in alignment with an upwardly opening recess in the base block, a pin hopper,l a conveyor leading pins from saidvhopper into signature.

JOHN W. MANSFIELD.

said presser block passage, a laterally shift-Y n able bar carried by the presser bloclr and having one end extensible into said passage to control the movement of pins'therethrough, resilient Ymeans normally urging said bar inwardly, and a bar actuating foot pivotally mounted upon the outerV end of the bar having a rounded lower surface arranged to beV brought intovcontact with the top of the base block when the presser block is lowered thereagainst to retract the pin retaining bar for the discharge of a pin into the recess.

5. The combination withV a press' havingv a base block and a reciprooable member movable relative thereto, a presser block carried by said member and having -a passage therethrough opening through the lower face thereof in alignment with an upwardly opening recess in the base block, a pin hopper, a conveyor leading pins from said hopper into said presser block passage, a laterally shiftable bar carried by the presser block and having one end extensible Ainto said passage to control the movement ofpins therethrough, resilient means normally urging said bar in.- wardly, a sleeve carried by the presser block and having said bar passed therethrough and further Vhousing said resilientvelement, and

a presser foot having an upstanding legpor- Y* tion pivotally attached to the outer end of said bar and having a rounded lower portion disposed in a plane below the presser-block 

